Hi, On 03/04/2012 10:58 PM, Xavion wrote:
Hi Jean-Francois I can confirm that GSPCA v2.15.1 removes the bad pixels when I use Cheese or VLC. However, I'm sorry to report that the Motion problems unfortunately still remain. Is there something else I must do to overcome the below errors? I'm happy to keep testing newer GSPCA versions for you until we get this fixed.
I guess that motion is using the JPG compressed frames rather then the i420 like special format these cameras also support, and it looks like we don't reserve enoug space to buffer these frames. To fix this we need to enlarge the size we reserve per frame in the sn9c20x driver, edit sn9c20x.c and search for vga_mode, in that table you will find a factor "4 / 8" (its in there 3 times), change all 3 occurences to "5 / 8" and try again, then "6 / 8", etc. Normally I would be suspicious about SOF / EOF detection when we need such a factor, but the timestamps in your log exactly match 30 fps, so that seems to be fine. And in my experience with the USB bandwidth stuff the sn9c20x does seem to compress less then other JPG cams, so it makes sense that it needs bigger buffers to store the frames too. Alternatively you can try if motion can be made to use a different format then JPG, by forcing it to use libv4l by starting it like this: LD_PRELOAD=/usr/lib/libv4l/v4l1-compat.so motion Note if you're on a rpm based 64 bit distro and motion is 64 bit too that should be: LD_PRELOAD=/usr/lib64/libv4l/v4l1-compat.so motion But that would just be working around the issue, it is better to fix the issue with using the JPG mode of the camera instead. Regards, Hans
`--> tail /var/log/kernel.log Mar 5 08:25:52 Desktop kernel: [ 6673.781987] gspca_main: frame overflow 156309> 155648 Mar 5 08:25:52 Desktop kernel: [ 6673.813992] gspca_main: frame overflow 156309> 155648 Mar 5 08:25:53 Desktop kernel: [ 6673.849986] gspca_main: frame overflow 155693> 155648 Mar 5 08:25:53 Desktop kernel: [ 6673.881989] gspca_main: frame overflow 156021> 155648 Mar 5 08:25:53 Desktop kernel: [ 6673.917991] gspca_main: frame overflow 156309> 155648 Mar 5 08:25:53 Desktop kernel: [ 6673.949993] gspca_main: frame overflow 156309> 155648 Mar 5 08:25:53 Desktop kernel: [ 6673.985990] gspca_main: frame overflow 156309> 155648 Mar 5 08:25:53 Desktop kernel: [ 6674.021981] gspca_main: frame overflow 156309> 155648 Mar 5 08:25:53 Desktop kernel: [ 6674.053985] gspca_main: frame overflow 156309> 155648 Mar 5 08:25:53 Desktop kernel: [ 6674.089989] gspca_main: frame overflow 156309> 155648 `--> tail /var/log/errors.log Mar 5 08:24:16 Desktop motion: [1] v4l2_next: VIDIOC_QBUF: Invalid argument Mar 5 08:24:16 Desktop motion: [1] Video device fatal error - Closing video device Mar 5 08:24:20 Desktop motion: [1] Retrying until successful connection with camera Mar 5 08:24:27 Desktop motion: [1] v4l2_next: VIDIOC_DQBUF: EIO (s->pframe 3): Input/output error Mar 5 08:24:27 Desktop motion: [1] v4l2_next: VIDIOC_QBUF: Invalid argument Mar 5 08:24:27 Desktop motion: [1] Video device fatal error - Closing video device Mar 5 08:24:30 Desktop motion: [1] Retrying until successful connection with camera Mar 5 08:24:33 Desktop motion: [1] v4l2_next: VIDIOC_DQBUF: EIO (s->pframe 0): Input/output error Mar 5 08:24:33 Desktop motion: [1] v4l2_next: VIDIOC_QBUF: Invalid argument Mar 5 08:24:33 Desktop motion: [1] Video device fatal error - Closing video device -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
-- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
